Meso-2, 3-dimercaptosuccinic acid as a novel chemical agent to stabilize heavy metals in MSWI fly ash

DOI

10.2991/iceep-16.2016.47How to use a DOI?

Keywords

Fly ash; Heavy metals; Chemical stabilization; Sodium sulfide; Sodium phosphate; Meso-2, 3-dimercaptosuccinic acid

Abstract

The fly ash from municipal solid waste incineration (MSWI) is generally classified as hazardous material. Fly ash often contains large amounts of potentially toxic metals (e.g. Pb, Cd), which can cause harm to the environmental and human health if released from the ash. The leaching concentration of heavy metals in fly ash usually beyond the standard limits and fly ash must be treated before disposal. Chemical stabilization for heavy metals in fly ash was explored. It was found that sodium sulfide (Na2S) and sodium phosphate (Na3PO4) were effective for heavy metal stabilization since they can convert soluble and leachable heavy metals into insoluble and non-leachable forms. In addition, meso-2, 3-dimercaptosuccinic acid (DMSA) showed great superiority in heavy metal stabilization process compared to Na2S and Na3PO4. In this work, the heavy metal stabilization efficiency of DMSA was experimentally studied, which was also compared with sodium sulfide and sodium phosphate, and typically Hg was stabilized more effectively by using DMSA.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Liguang Lv
AU  - Weixiao Zhou
PY  - 2016/11
DA  - 2016/11
TI  - Meso-2, 3-dimercaptosuccinic acid as a novel chemical agent to stabilize heavy metals in MSWI fly ash
BT  - Proceedings of the 2016 5th International Conference on Energy and Environmental Protection (ICEEP 2016)
PB  - Atlantis Press
SP  - 274
EP  - 279
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-16.2016.47
DO  - 10.2991/iceep-16.2016.47
ID  - Lv2016/11
ER  -